Vacuum-tube base



Aug. 13, 192 J. 1'. HAVEKOST ET AL VACUUM TUBE BASE Filed May 7, 1926 -|NVENTOR5 age. BY

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ATTORN EY Patented Aug. 13, 1929.

UNITED STATES 1,124,109 PATENT OFFICE.

JOHN T. HAVKKOST, OE ELMHURST, NEW YORK, AND JAMES EARL antenna, 01 DETROIT, MICHIGAN.

VACUUM-TUBE BASE.

Application filed Kay 7, 1926. Serial No. 107,328.

Our invention relates to vacuum tube devices and particularly to base devices therefor.

An object of our invention is to provide 5 a base for a vacuum tube structure, adapted to facilitate the insertion of the tube into a standard socket, and the connection thereto of special current supplies.

Another object of our invention is to provide a special base for a vacuum tube, adapted to facilitate the utilization of tubes capable of translating higher owers, and the connection thereto of additional extra voltage sources.

vide a base for a high power vacuum tube for signal receiving apparatus, adapted to coo rate with existing circuits and sockets an to provide means for the connection 0 of the additional voltage sources without change of existing wiring and circuits.

Another object of our invention is to provide a base for a vacuum tube device having therein the customary connection prongs,

and also. additional circuit connection members.

Another ob'ect of our invention is to provide an artic e of manufacture comprising a vacuum tube base of such simple construction that additional features are provided without increase of manufacture costs and without exceeding the present standard dimensions.

In the development of the art of radio receiving it has been found desirable to provide, in certain electrical systems, vacuum tubes adapted to utilization with higher plate and grid voltages, and higher powers than other tubes in the same system and to insert such higher power tubes in the place of previously used smaller tubes in the existin radio receiver apparatus. It has been found desirable to employ the same filament heating source and to utilize the same plate and grid batteries as are employed with the other tubes in the set. It is also desirable to rovide additional plate and grid voltage or supplying the power tube only. Likewise it is undesirable, and some times difiicult, to modify the wiring already built in to the receiver a paratus, for connecting in the additional vo tage to the power tube.

Our invention provides a simple, compact, inexpensive, base member adapted to coo ll crate with the power tube, adapted to h:

Another object of our. invention is to pro-' to provide a special base for a vacuum tube device, adapted to permit the insertion thereof into any existing tube socket and the simultaneous connection thereto only of additional auxiliary current sources and to utilize existing current sources also, without changes in existing circuits and without exceeding a size which is conveniently usable with existing apparatus.

Other objects and structural details of our invention will be apparent from the following description when read in connection with the accompanying drawin wherein:

Figure 1 is a view in vertica elevation, partly in section of an embodiment of the device of our invention,

Figure 2 is a view partly in section at the line II, of the same embodiment,

Figure 3 is a vertical sectional view of the base member of the same embodiment of our invention,

Figure 4 is a plan view of the embodiment of Figure 3,

Figure 5 is a bottom view of the embodiment of Figure 3 and,

Figure 6 is a view in vertical elevation and partly in section of an alternative embodiment of our invention.

Referring to the figures, we provide a socket 1, which may preferabl be of molded material composition, adapte to receive and be attached to the seal member end of a I vacuum tube device 2 and to be inserted in a socket 3. Referring particularly to Figure 1, the base member 1 consists of a cylindrical portion 4 and a closed end portion 5. Contact prong members 6 are attached 1' to the end member 5, and serve to make connection with contact springs in the socket member 3 in the usual manner. A supporting member 7, which may be a collar as shown, or maybe a series of lugs is at- 110 ture, and for Y in th tached to or formed integrally with, the

ductor members 11 and 12 eadin from the B prong members 6 and the tube e ements of the tube 2 to the terminal members 8. This construction provides means for secreting the connector wires within the base strucpreventing short circuit between them. i

The preferred embodiment of our invention as shown in the figures is formed of an integral body of molded composition which may be of the bakelite type or of the shellac type, and may be molded in the customary steel molds. The molds may comprise the usual split portions, one having a cup opening with an annular rim portion and the ot er a plunger to form the cup portion 4 of the base and the collar ortion 7 thereon. Openings may be provide for carrying the lug members in the collar portion 7 by the embodiment of suitable plugs in the molded member in which the annular ring to produce the collar 7 is formed. By this means the base member may be molded in an integral piece to which the auxiliary connector members are easily added and in which the necessary connector wires are easil placed.

ternatively the base member may be made of metal, stamped, drawn or rolled or otherwise formed, in which case lugs may be formed upon the rim. In this embodiment insulating bushings must be provided between the connector members and the metal base.

The length of the tubular portion 4 is conveniently made such that the distance from the free end to the under surface of the collar ortion 7 1s slightly greater than the stan ard distance from the contact springs of the standardsocket to the upper edge thereof, and the outer diameter of t e collar member 7 may be equal to or only slightly eater than the maximum diameter of the tu e portion 2. Connections may be made between the prong members 6, the vacuum tube electrodes, and the terminal members 8 as shown e plan view of Figure 2, whereby the filament leads are directly connected to the proper prong members, the grid lead pron and the grld lead'are respectively connected to one pair of the binding posts 8 and the plate lead rongland the plate lead are connected to t e ot er pair of bindin posts 8. By this means the additional gri voltage requlred for the power tube may be conveniently provided and connected between of the prong members 6.

through the socket contact spring. The ad- "ditionalplate voltage is conveniently connected to the binding posts 8 marked 13+ and B- and thereby in series with the out put device of the tube, and with the other battery voltage supply.

Alternatively the well known Fahnstock connectors or other terminal connectors may be used, in which case the collar 7 may be dispensed with and the connectors mounted directly upon the tubular portion 4 as'shown in the embodiment illustrated in Figure 6.

By this means we are enabled to provide a power vacuum tube with specialbase mem' ber adapted for insertion directly into the standard vacuum tube socket, having contact members adapted to make connection therein and having additional conductor members for the convenient connection of additional power supplies without disturbance of the wiring to the standard socket, in a space which permits insertion of the tube structure within the usual vacuum tube apparatus.

While we have shown but two embodiments of' our invention in the foregoing drawings and descriptions it is capable of various modifications therefrom without departing from the spirit thereof, and it is desired therefore that only such limitations shall be imposed thereon as are required by claims.

We claim as our invention:

1. A base for a vacuum tube device, comprising a tubular portion having terminals at an end thereof and a collar portion having auxiliary terminals thereon.

2. A base for a vacuum tube device, comprising a cup shaped portion having prongs in the bottom thereof, a collar around the top thereof, and terminal members insulatingly attached to said collar.

3. A base for a vacuum tube device, comprising a cup shaped. portion, and a projecting member on the edge thereof, prongs at tached to the bottom thereof, auxiliary terminals in said projecting member, and connector means between certain of said prongs and certain of said terminals.

4. A vacuum tube device, comprising a tube portion having electrodes and a base portion of insulating material having contact prongs at an end thereof, certain thereof being attached to said vacuum tube electrodes, a projecting member, and connector members'thereon, certain thereof being connected to said prongs and others thereof being connected to said 'tube electrodes.

5. A base for a vacuum tube device, comprising a cup shaped member'having prongs in the bottom thereof, and an auxiliary connection terminal supporting means integral therewith and projecting laterally therefrom.

6. A base for a vacuum tube device, comprising a cup shaped member having prongs, connection terminal supporting means integral therewith and projecting laterally therefrom, and auxiliary connection terminals thereon.

7. A base for a vacuum tube device, comprising a cup shaped portion, prongs attached to the bottom thereof, a terminal supporting means and auxiliary terminals thereon, connector means between certain of said prongs and certain of said terminals, and means including openings in the body of said base for housing said connector means.

8. A vacuum tube base member, comprising an integral member of plastic material, having a cup shaped portion, terminals in the bottom thereof and a projecting means for supporting a connection terminal, with openings therein for connector members.

9. A vacuum tube device, comprising a bulb member having electrodes adapted for the translation of superior degrees of power, and a base portion adapted for the connection thereto of auxiliary power sources and comprising a cup shaped portion having prongs thereon, an auxiliary contact supporting means, and connecting means thereon adapted for the connection of said additional power sources in series between said prongs and said vacuum tube electrodes.

10. A vacuum tube device, comprising a bulb member having electrodes adapted for the translation of superior degrees of power,

and a base portion adapted for the connection thereto of auxiliary power sources and comprising a cup shaped portion having prongs thereon, an auxiliary contact supporting means, connecting means thereon adapted .for the connection of said additional power sources in series between said prongs and said vacuum tube electrodes, connector means between said prongs and said auxiliary terminals, and means including openings in said cup for housing said connectors adjacent the glass of said bulb member.

11. A vacuum tube base comprising a cupshaped portion having a rim and bottom, four contact making prongs attached to the bottom thereof, a projecting member at said rim, four auxiliary connectors insulatingly positioned thereon, and connections between said prongs and said connectors.

12. A thermionic tube including anode, cathode and modulating-elements, base for said tube, terminal connections for the several elements carried by the base, lead conductors intermediate the terminal connections and said elements, and spaced auxiliary terminals in the lead conductors pertaining to the anode and modulating elements, across which accessory devices may be connected into the anode and modulating circuits.

13. In a thermionic valve, including a grid element, a main electrical contact terminal and means for bridging an auxiliary grid biasing battery intermediate the grid element and terminal.

JOHN T. HAVEKOST. I J. EARL SIMONDS. 

